iptables -A INPUT -i tap0 -j ACCEPT
iptables -A INPUT -i br0 -j ACCEPT
iptables -A OUTPUT -o tap0 -j ACCEPT
iptables -A OUTPUT -o br0 -j ACCEPT
iptables -A FORWARD -i br0 -j ACCEPT
iptables -A FORWARD -o br0 -j ACCEPT
iptables -A FORWARD -i tap0 -j ACCEPT
iptables -A FORWARD -o tap0 -j ACCEPT